thats the question
the other question is , if you don't set a pin will spi2 still function

The answer from the testing is
1. Not Setting SS pin for ssp2 on the PPS does not appear to effect SSP2 running in this config
2. assigning SS on the PPS to portd.0 for SSP2 does not appear to effect SSP2 running or effect the I/O operation ( both in and out of Portd.0 ) , which was in use for other items

Cheers

Sheldon